Inventor
Timothy M. Rowan
Inventor
Wauwatosa, WI, US
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters55%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems23%
G01RMeasuring electric variables5%
H03KPulse technique5%
B66BElevators2%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light2%
G01NInvestigating or analysing materials by determining their chemical or physical properties2%
G02BOptical elements, systems or apparatus2%
H02HEmergency protective circuit arrangements2%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications2%
PatentTitleYear
10,756,659Counter electromotive force estimation202010,727,772Predicting an induction machine load pattern202010,601,343Power conversion system with PWM carrier transition smoothing and autotuning202010,541,626Power conversion system with PWM carrier emulation202010,389,292DC bus regulation using rectifier and inverter20199,774,284'Rotor position estimation apparatus and methods'20179,584,043'Inverter phase current reconstruction apparatus and methods'20179,318,976'Adjustable PWM method to increase low speed starting torque and inverter voltage measurement accuracy'20169,287,812'Method and apparatus for stability control of open loop motor drive operation'20169,036,382'Method and apparatus for ripple and phase loss detection'20157,268,514'Motor control for stopping a load and detecting mechanical brake slippage'20077,135,833'Motor control for flux-reduced braking'20066,229,278'Voltage and current limiting method and apparatus for a voltage/frequency drive'20016,014,007'Method and apparatus for starting an AC drive into a rotating motor'20005,965,995'Transient inductance tuner for motor control'19995,923,144'Frequency generator for a motor controller'19995,717,305'Method and apparatus for starting an electric motor'19985,689,169'Transient inductance identifier for motor control'19975,479,081'AC motor controller with voltage margin adjustment'19955,298,847'Counter EMF detector for use in electric motor controllers'19945,140,248'Open loop motor control with both voltage and current regulation'19925,032,771'Slip control based on sensing voltage fed to an induction motor'19915,008,608'Controller for starting and stopping electric motors'19915,003,241'Motor stoppage detection using back emf voltage'19914,996,470'Electric motor speed control apparatus and method'19914,978,897'Motor controller with an improved stopping technique'19904,916,370'Motor stoppage apparatus and method using back emf voltage'19904,862,052'Method for stopping an electric motor'19894,706,012'Frequency compensated regulator'19874,680,695'Cross coupled current regulator'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–2000Patents assigned to ALLEN BRADLEY CO (16)· patent assignee history
1987Based in Milwaukee, WI, US· patent location history
1989–2020Based in Wauwatosa, WI, US· patent location history
1994Based in Milwaukee County, WI, US· patent location history
2006–2020Patents assigned to ROCKWELL AUTOMATION TECH INC (11)· patent assignee history
2015Patents assigned to LEGGATE DAVID (1)· patent assignee history
2015Patents assigned to LI BING (1)· patent assignee history
2016Patents assigned to LIU JINGBO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ALLEN BRADLEY CO | 16 | 1987–2000 |
| ROCKWELL AUTOMATION TECH INC | 11 | 2006–2020 |
| LEGGATE DAVID | 1 | 2015 |
| LI BING | 1 | 2015 |
| LIU JINGBO | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Wauwatosa, WI, US | 27 | 1989–2020 |
| Milwaukee, WI, US | 2 | 1987 |
| Milwaukee County, WI, US | 1 | 1994 |